<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%><%
response.setContentType("application/json");
response.setCharacterEncoding("UTF-8");
Exception exception = (Exception)request.getAttribute("exception");
exception.printStackTrace();
%>{"success":false, "err":"您请求数据的时候发生了错误！"}